PHP按数组列表优先级对多维数组排序

function sortByPriority($a, $b) {
    $priorityList = array('A', 'B', 'C', 'D'); // 优先级列表
    $priorityA = array_search($a['priority'], $priorityList);
    $priorityB = array_search($b['priority'], $priorityList);
    
    return $priorityA - $priorityB;
}

$array = array(
    array('name' => 'Item 1', 'priority' => 'B'),
    array('name' => 'Item 2', 'priority' => 'A'),
    array('name' => 'Item 3', 'priority' => 'D'),
    array('name' => 'Item 4', 'priority' => 'C')
);

usort($array, 'sortByPriority');

print_r($array);

Array
(
    [0] => Array
        (
            [name] => Item 2
            [priority] => A
        )

    [1] => Array
        (
            [name] => Item 1
            [priority] => B
        )

    [2] => Array
        (
            [name] => Item 4
            [priority] => C
        )

    [3] => Array
        (
            [name] => Item 3
            [priority] => D
        )
)